Statistics – Computation
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989cha%26a..13...97z&link_type=abstract
Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 13, March 1989, p. 97-104. Translation. Research supported by the Chin
Statistics
Computation
Eclipsing Binary Stars, Irregular Variable Stars, Light Curve, Starspots, Stellar Activity, Astronomical Photometry, Computational Astrophysics, Stellar Temperature
Scientific paper
Nine two-color light curves observed between 1950 and 1983 of the W UMa type contact binary U Peg were analyzed. The distortions in the light curves during 1958-1970 can be successfully simulated with starspot activity. Using an improved W-D program containing differential correction of spot parameters, the spot parameters, longitude, latitude, temperature and radius, and their time variations are obtained. The photometric solutions at the various epochs also show that there may be other factors causing light curve distortion, including variation in the temperature difference between the two components, instability of the common shell and some other physical factors unaccounted for by present physical models.
Zhai Di-Sheng
Zhang Xiao-Yu
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